1560001220 has 48 divisors (see below), whose sum is σ = 3528741888. Its totient is φ = 577610880.

The previous prime is 1560001211. The next prime is 1560001283. The reversal of 1560001220 is 221000651.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40439 + ... + 68958.

It is an arithmetic number, because the mean of its divisors is an integer number (73515456).

Almost surely, 2^1560001220 is an apocalyptic number.

1560001220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1560001220 is an abundant number, since it is smaller than the sum of its proper divisors (1968740668).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1560001220 is a wasteful number, since it uses less digits than its factorization.

1560001220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109460 (or 109458 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 1560001220 is about 39496.8507605353. The cubic root of 1560001220 is about 1159.7783018650.

Adding to 1560001220 its reverse (221000651), we get a palindrome (1781001871).

The spelling of 1560001220 in words is "one billion, five hundred sixty million, one thousand, two hundred twenty".